Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb4bd2793b45a95d…

MALICIOUS

PDF

45.4 KB Created: 2020-08-28 08:38:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 958c6c628e759038edeb8c57cfae3314 SHA-1: 8e6292408a12d3ba0e0166ccb9c329b2f46856ba SHA-256: bb4bd2793b45a95dddace785e7bfef3699505bf94e3df3bde4e390992c7605df
128 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious Link T1566.002 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious intent, including links to known malicious redirectors and a link farm designed to host numerous PDFs. The document body includes a call-to-action phrase and the primary malicious URL, suggesting a lure to download further content. The presence of a link farm and a redirector points to a campaign distributing potentially unwanted or malicious files.

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=utm+avo+free+download
    • http://bupadof.softcinch.com/uploads/1/3/1/3/131380504/dd7776096a0e34b.pdf
    • http://gixok.stoptraffickingtoday.com/uploads/1/3/1/3/131381204/jifoduxabelu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4090/6135/files/37443267038.pdf
    • https://cdn.shopify.com/s/files/1/0429/2762/0249/files/ziwenopanefasanidagedi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/synonyms_of_all_english_words.pdf
    • https://cdn.shopify.com/s/files/1/0434/0911/3253/files/bewezopemep.pdf
    • https://cdn.shopify.com/s/files/1/0465/0598/4158/files/49352954284.pdf
    • https://cdn.shopify.com/s/files/1/0428/5631/7091/files/xexukese.pdf
    • https://cdn.shopify.com/s/files/1/0429/8381/7375/files/appli_acapella_android.pdf
    • https://cdn.shopify.com/s/files/1/0429/3551/7337/files/fudiliti.pdf
    • https://cdn.shopify.com/s/files/1/0434/5823/2473/files/nupenefuraju.pdf
    • https://cdn.shopify.com/s/files/1/0428/4809/2323/files/59507741071.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059ae.bin
b699c29123e312f0af3ea8f8193da2f4fed88ea01811f34b104ef3a5a5aa7766		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59AE 5020 bytes
font_01_sfnt_off00006ac2.bin
beb9ca67c846341676824c8199dccf1ada9bb2aee9c148abb0f0f19814492c0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC2 14528 bytes
font_02_sfnt_off00009431.bin
e5245523bd71a78e06ca3300da63f55ad096e28dd8c1a5e83e138be64f7d0aee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9431 16084 bytes

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